- Zero-Sum Taiyou (ゼロサム太陽; Zero-Sum Sun)
- Akimoto Yasushi
- Other Information
- Arrangement: Sizuk
Artist: Team K (チームK)
- Team K: Akimoto Sayaka, Itano Tomomi, Uchida Mayumi, Umeda Ayaka, Oshima Yuko, Kikuchi Ayaka, Tanabe Miku, Nakatsuka Tomomi, Nito Moeno, Nonaka Misato, Fujie Reina, Matsui Sakiko, Minegishi Minami, Miyazawa Sae, Yokoyama Yui, Yonezawa Rumi
There are currently two versions of "Zero-Sum Taiyou" to be found in AKB48's discography. These versions are:
- Zero-Sum Taiyou (Original)
- Found on the Type-K edition of the "Ue kara Mariko" single as track #3.
- Zero-Sum Taiyou (off vocal ver.)
- Found on the Type-K edition of the "Ue kara Mariko" single as track #6. This is the standard version without the main vocals.
- STUDIO48: "Zero-Sum Taiyou" lyrics